Almost all of them have European surnames, but only ~20% of them have a European ancestor. If you are white, chances are good one of your ancestors came from France, or used a French surname to fool the authorities.
1 AC, or alternating current means the electrical current is alternating directions in a repetitive pattern.  AC is created by generators in power plants, and other sources. This AC current is delivered to our homes and businesses by the power lines we see everywhere.
When electrons move through a conductor an electric current is created. A current that always flows in one direction is called a direct current (DC). A battery for example, produces a direct current. A current that flows back and forth is called an alternating current (AC).